Fire blocking is not used much any more as the wall board should have a fire suppression rating. It (blocking) used to be required on walls attached to the dwelling area. Now in our area not even wallboard is required if you are using plywood and fiberglass insulation. I think they figure the smoke alarms and carbon monoxide detectors will warn you before a fire can get big enough. These are required in our area and must be attached to the home electrical circuit so you don't forget to change the batteries.